linux-kernel - Re: [PATCH] powerpc: Define cpus_in

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Date:	Wed, 1 Feb 2012 15:28:34 -0500
From:	Paul Gortmaker <paul.gortmaker@...driver.com>
To:	<paulmck@...ux.vnet.ibm.com>
CC:	<linuxppc-dev@...ts.ozlabs.org>, <linux-kernel@...r.kernel.org>,
	<paulus@...ba.org>, <anton@...ba.org>, <ben@...adent.org.uk>,
	<mikey@...ling.org>
Subject: Re: [PATCH] powerpc: Define cpus_in_crash only for SMP kernels

On 12-02-01 01:55 PM, Paul E. McKenney wrote:
> The variable cpus_in_crash gets a defined-but-not-used warning when
> CONFIG_SMP=n, so fix by placing the variable under ifdef.

I think Ben already merged a similar fix.

http://patchwork.ozlabs.org/patch/136549/

P.

> 
> Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
> 
> diff --git a/arch/powerpc/kernel/crash.c b/arch/powerpc/kernel/crash.c
> index 28be345..eb3384e 100644
> --- a/arch/powerpc/kernel/crash.c
> +++ b/arch/powerpc/kernel/crash.c
> @@ -46,7 +46,9 @@
>  
>  /* This keeps a track of which one is the crashing cpu. */
>  int crashing_cpu = -1;
> +#ifdef CONFIG_SMP
>  static atomic_t cpus_in_crash;
> +#endif /* #ifdef CONFIG_SMP */
>  static int time_to_dump;
>  
>  #define CRASH_HANDLER_MAX 3
> 
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